Chance The Rapper was at a loss for words as he thanked Mac for taking him on second ever tour and credited him with helping him launch his career. "I dont know what to say Mac Miller took me on my second tour ever," Chano tweeted. "But beyond helping me launch my career he was one of the sweetest guys I ever knew. Great man. I loved him for real. Im completely broken."

The founder and president of Rostrum Records, Benjy Grinberg, voiced his heartbreak on Twitter, writing, "I feel absolutely broken. I love you, Mac."

Miller signed with Rostrum Records in 2010 and released a number of projects on the label including his 2011 debut album Blue Side Park and his sophomore offering, Watching Movies With the Sound Off.

J. Cole appeared to be taking the news of Miller's death hard, tweeting, "Fuckkkkkk" and "Rest In Peace to the great soul Mac Miller."

The rapper also shared a message to his peers about substance abuse, writing, "This is a message for anybody in this game that's going through something. If you don't feel right, if you feel you have a substance problem, if you need a ear to vent to. If you uncomfortable talking to people around you. Please reach out to me."

Fellow Pittsburgh native Wiz Khalifa also paid his condolences, tweeting, "Praying for Mac's family and that he rest easy #pgh #412."